Installing Door Sounder Sensors
You need to install Door Sounder sensors in pockets welded to the trawl doors.
Before you begin
About this task
- The sensor down sounder must have a roll angle of 25° in relation to the door.
- Attack angle: 25-40°
- Elevation angle: 15-20°. Adjust the angle so that the sensor points toward the vessel during operation.
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Procedure
- Remove the screw holding the pocket cover.
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Install Door Sounder sensors inside each door pocket: the
top of the transducer (side with marker on housing) must be oriented toward the
vessel and the side with the circle/A must points downwards with an angle of 25°
in relation to the door.
Note: For bottom trawling, install sensors on the lower part of doors.
- Attach the safety line from the sensor to the pocket and fasten the pocket's screw.
- Make sure there is nothing in front of the sensors that would hide their signal toward the vessel, and nothing in front of the down sounder.